<trans-title>Preparation and Mechanical Property of the Ceramic-reinforced Cr<sub>0.5</sub>MoNbWTi Refractory High-entropy Alloy Matrix Composites</trans-title>

Shasha LÜ; Yufei ZU; Guoqing CHEN; Bojun ZHAO; Xuesong FU; Wenlong ZHOU

doi:10.15541/jim20200479

Journal of Inorganic Materials, Volume. 36, Issue 4, 386(2021)

Preparation and Mechanical Property of the Ceramic-reinforced Cr_0.5MoNbWTi Refractory High-entropy Alloy Matrix Composites

Shasha LÜ1... Yufei ZU2, Guoqing CHEN1,*, Bojun ZHAO1, Xuesong FU1 and Wenlong ZHOU1 |Show fewer author(s)

Author Affiliations

¹1. Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, China

²2. Key Laboratory of Advanced Technology for Aerospace Vehicles (Liaoning Province), School of Aeronautics and Astronautics, Dalian University of Technology, Dalian 116085, China

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Figures & Tables(9)

1. XRD patterns of the powders mechanically milled for different time

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$SEM images of the ceramic-reinforced refractory high-entropy alloys matrix composite$

2. SEM images of the ceramic-reinforced refractory high-entropy alloys matrix composite

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3. XRD pattern of the as-sintered composite

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4. Backscattered electron SEM image (a) and the corresponding EPMA mappings (b-i) of the alloying components in the composite

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5. Gibbs free energies of the reactions between the nonmetallic and metallic elements as a function of temperature

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$Engineering stress-strain curves of the composite at room temperature and 1400 ℃ (a); Comparison of mechanical properties of the typical refractory HEAs (b)$

6. Engineering stress-strain curves of the composite at room temperature and 1400 ℃ (a); Comparison of mechanical properties of the typical refractory HEAs (b)

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Table 1. Concentrations of C, N, and O in the raw powders and as-milled powders
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Table 1. Concentrations of C, N, and O in the raw powders and as-milled powders
Sample C/wt% O/wt% N/wt%
Mixture before ball milling 0.044 0.448 0.046
Mixture after ball milling 0.482 2.181 3.920

Table 2. Chemical compositions (at%) of the phases in the as-sintered composite
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Table 2. Chemical compositions (at%) of the phases in the as-sintered composite
Cr Mo Nb W Ti Fe C O N
BCC 15.25 34.17 8.21 37.15 0.58 4.25 0.39 0 0
(Nb,Ti) (N,C) 1.38 0.39 31.73 0.03 18.37 0.12 9.95 4.51 33.52
Ti₂O₃ 1.18 0.81 1.32 0.71 35.14 0.21 0.96 59.66 0.01

Table 3. Enthalpy of mixing and electronegativity difference between nonmetallic elements and metallic elements

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Table 3. Enthalpy of mixing and electronegativity difference between nonmetallic elements and metallic elements

Enthalpy of mixing/(kJ·mol^-1)/Electronegativity difference	Cr	Mo	Nb	W	Ti
C*	-61/0.89	-67/0.39	-102/0.95	-60/0.85	-109/1.01
N*	-107/1.38	-115/0.88	-174/1.44	-103/1.34	-190/1.50
O**	-205/1.78	-174/1.28	-307/1.84	-164/1.74	-327/1.90

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Shasha LÜ, Yufei ZU, Guoqing CHEN, Bojun ZHAO, Xuesong FU, Wenlong ZHOU. Preparation and Mechanical Property of the Ceramic-reinforced Cr_0.5MoNbWTi Refractory High-entropy Alloy Matrix Composites[J]. Journal of Inorganic Materials, 2021, 36(4): 386

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